1 /* 2 * Copyright (C) 2011 Andes Technology Corporation 3 * Shawn Lin, Andes Technology Corporation <nobuhiro@andestech.com> 4 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 * 20 */ 21 22 #include <common.h> 23 #include <command.h> 24 #include <image.h> 25 #include <u-boot/zlib.h> 26 #include <asm/byteorder.h> 27 28 DECLARE_GLOBAL_DATA_PTR; 29 30 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 31 defined(CONFIG_CMDLINE_TAG) || \ 32 defined(CONFIG_INITRD_TAG) || \ 33 defined(CONFIG_SERIAL_TAG) || \ 34 defined(CONFIG_REVISION_TAG) 35 static void setup_start_tag(bd_t *bd); 36 37 # ifdef CONFIG_SETUP_MEMORY_TAGS 38 static void setup_memory_tags(bd_t *bd); 39 # endif 40 static void setup_commandline_tag(bd_t *bd, char *commandline); 41 42 # ifdef CONFIG_INITRD_TAG 43 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end); 44 # endif 45 static void setup_end_tag(bd_t *bd); 46 47 static struct tag *params; 48 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 49 50 int do_bootm_linux(int flag, int argc, char *argv[], bootm_headers_t *images) 51 { 52 bd_t *bd = gd->bd; 53 char *s; 54 int machid = bd->bi_arch_number; 55 void (*theKernel)(int zero, int arch, uint params); 56 57 #ifdef CONFIG_CMDLINE_TAG 58 char *commandline = getenv("bootargs"); 59 #endif 60 61 if ((flag != 0) && (flag != BOOTM_STATE_OS_GO)) 62 return 1; 63 64 theKernel = (void (*)(int, int, uint))images->ep; 65 66 s = getenv("machid"); 67 if (s) { 68 machid = simple_strtoul(s, NULL, 16); 69 printf("Using machid 0x%x from environment\n", machid); 70 } 71 72 show_boot_progress(15); 73 74 debug("## Transferring control to Linux (at address %08lx) ...\n", 75 (ulong)theKernel); 76 77 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 78 defined(CONFIG_CMDLINE_TAG) || \ 79 defined(CONFIG_INITRD_TAG) || \ 80 defined(CONFIG_SERIAL_TAG) || \ 81 defined(CONFIG_REVISION_TAG) 82 setup_start_tag(bd); 83 #ifdef CONFIG_SERIAL_TAG 84 setup_serial_tag(¶ms); 85 #endif 86 #ifdef CONFIG_REVISION_TAG 87 setup_revision_tag(¶ms); 88 #endif 89 #ifdef CONFIG_SETUP_MEMORY_TAGS 90 setup_memory_tags(bd); 91 #endif 92 #ifdef CONFIG_CMDLINE_TAG 93 setup_commandline_tag(bd, commandline); 94 #endif 95 #ifdef CONFIG_INITRD_TAG 96 if (images->rd_start && images->rd_end) 97 setup_initrd_tag(bd, images->rd_start, images->rd_end); 98 #endif 99 setup_end_tag(bd); 100 #endif 101 102 /* we assume that the kernel is in place */ 103 printf("\nStarting kernel ...\n\n"); 104 105 #ifdef CONFIG_USB_DEVICE 106 { 107 extern void udc_disconnect(void); 108 udc_disconnect(); 109 } 110 #endif 111 112 cleanup_before_linux(); 113 114 theKernel(0, machid, bd->bi_boot_params); 115 /* does not return */ 116 117 return 1; 118 } 119 120 121 #if defined(CONFIG_SETUP_MEMORY_TAGS) || \ 122 defined(CONFIG_CMDLINE_TAG) || \ 123 defined(CONFIG_INITRD_TAG) || \ 124 defined(CONFIG_SERIAL_TAG) || \ 125 defined(CONFIG_REVISION_TAG) 126 static void setup_start_tag(bd_t *bd) 127 { 128 params = (struct tag *)bd->bi_boot_params; 129 130 params->hdr.tag = ATAG_CORE; 131 params->hdr.size = tag_size(tag_core); 132 133 params->u.core.flags = 0; 134 params->u.core.pagesize = 0; 135 params->u.core.rootdev = 0; 136 137 params = tag_next(params); 138 } 139 140 141 #ifdef CONFIG_SETUP_MEMORY_TAGS 142 static void setup_memory_tags(bd_t *bd) 143 { 144 int i; 145 146 for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { 147 params->hdr.tag = ATAG_MEM; 148 params->hdr.size = tag_size(tag_mem32); 149 150 params->u.mem.start = bd->bi_dram[i].start; 151 params->u.mem.size = bd->bi_dram[i].size; 152 153 params = tag_next(params); 154 } 155 } 156 #endif /* CONFIG_SETUP_MEMORY_TAGS */ 157 158 159 static void setup_commandline_tag(bd_t *bd, char *commandline) 160 { 161 char *p; 162 163 if (!commandline) 164 return; 165 166 /* eat leading white space */ 167 for (p = commandline; *p == ' '; p++) 168 ; 169 170 /* skip non-existent command lines so the kernel will still 171 * use its default command line. 172 */ 173 if (*p == '\0') 174 return; 175 176 params->hdr.tag = ATAG_CMDLINE; 177 params->hdr.size = 178 (sizeof(struct tag_header) + strlen(p) + 1 + 4) >> 2; 179 180 strcpy(params->u.cmdline.cmdline, p) 181 ; 182 183 params = tag_next(params); 184 } 185 186 187 #ifdef CONFIG_INITRD_TAG 188 static void setup_initrd_tag(bd_t *bd, ulong initrd_start, ulong initrd_end) 189 { 190 /* an ATAG_INITRD node tells the kernel where the compressed 191 * ramdisk can be found. ATAG_RDIMG is a better name, actually. 192 */ 193 params->hdr.tag = ATAG_INITRD2; 194 params->hdr.size = tag_size(tag_initrd); 195 196 params->u.initrd.start = initrd_start; 197 params->u.initrd.size = initrd_end - initrd_start; 198 199 params = tag_next(params); 200 } 201 #endif /* CONFIG_INITRD_TAG */ 202 203 #ifdef CONFIG_SERIAL_TAG 204 void setup_serial_tag(struct tag **tmp) 205 { 206 struct tag *params = *tmp; 207 struct tag_serialnr serialnr; 208 void get_board_serial(struct tag_serialnr *serialnr); 209 210 get_board_serial(&serialnr); 211 params->hdr.tag = ATAG_SERIAL; 212 params->hdr.size = tag_size(tag_serialnr); 213 params->u.serialnr.low = serialnr.low; 214 params->u.serialnr.high = serialnr.high; 215 params = tag_next(params); 216 *tmp = params; 217 } 218 #endif 219 220 #ifdef CONFIG_REVISION_TAG 221 void setup_revision_tag(struct tag **in_params) 222 { 223 u32 rev = 0; 224 u32 get_board_rev(void); 225 226 rev = get_board_rev(); 227 params->hdr.tag = ATAG_REVISION; 228 params->hdr.size = tag_size(tag_revision); 229 params->u.revision.rev = rev; 230 params = tag_next(params); 231 } 232 #endif /* CONFIG_REVISION_TAG */ 233 234 235 static void setup_end_tag(bd_t *bd) 236 { 237 params->hdr.tag = ATAG_NONE; 238 params->hdr.size = 0; 239 } 240 241 #endif /* CONFIG_SETUP_MEMORY_TAGS || CONFIG_CMDLINE_TAG || CONFIG_INITRD_TAG */ 242